by Haitharn » Wed Mar 16, 2016 2:35 pm
I have it because I use vamp embrace a lot, I am in the warlock group so they can lifetap. My dps is lower because I have to spend time keeping vamp up, putting 2 talents into improved vamp, and it increases my threat. I know the top DPS shadow priests don't even spec into it, let alone use it at all. My guild's top DPS is usually the warlocks, but other guilds are usually melee dps (we only have a single rank 14, other guilds have numerous).
If you are looking for higher DPS, don't spec it. If you are looking for more utility, spec it.